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31. 发明公开

EP3531532A1 METHOD FOR CHARGING SUB-MODULE BASED HYBRID CONVERTER 审中-公开
公开(公告)号：EP3531532A1
公开(公告)日：2019-08-28
申请号：EP18739444.0
申请日：2018-01-12
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： DING, Jiudong , LU, Yu , DONG, Yunlong , LI, Haiying , TIAN, Jie , QIU, Defeng , JIANG, Tiangui , LIAN, Jianyang
IPC分类号： H02J7/04
摘要： The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.

32. 发明公开

EP3157122A1 LINE POWER CONTROL METHOD AND SYSTEM OF UNIFIED POWER FLOW CONTROLLER 审中-公开
标题翻译： LEITUNGSSTROMSTEUERUNGSVERFAHREN UND -SYSTEM EINES VEREINHEITLICHTEN STROMFLUSSREGLERS
公开(公告)号：EP3157122A1
公开(公告)日：2017-04-19
申请号：EP15819677.4
申请日：2015-01-22
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： TIAN, Jie , PAN, Lei , LIU, Chao , SHEN, Quanrong , LI, Haiying , LU, Yu , DONG, Yunlong
IPC分类号： H02J3/24
CPC分类号： G05B15/02 , H02J3/24 , H02J13/00
摘要： The present invention provides a line power control method and system for a unified power flow controller. The line power control method for a unified power flow controller includes outer loop line power control, inner loop valve side current control, and converter valve control. Series-side converter valve side current reference values I sedref and I seqref are calculated by means of the outer loop line power control according to line power instructions P ref and Q ref that are input, a measured line power U L , and measured line power P line and Q line ; a converter output voltage reference value U cref is calculated by means of the inner valve side current control according to the valve side current reference values that are output by means of the outer loop power control, a measured valve side current, and a measured valve side voltage; and finally, a converter outputs, according to the voltage reference value, a corresponding voltage to control line power to achieve a reference value. The control method is simple and practical, has high reliability, can rapidly and accurately control the line power, and can implement independent decoupling control of active power and reactive power of a line.
摘要翻译：本发明提供了一种用于统一功率流量控制器的线路功率控制方法和系统。统一动力流量控制器的线路功率控制方法包括外环线路功率控制，内循环阀侧电流控制和转换阀控制。串联侧转换器阀侧电流参考值I sedref和I seqref通过根据输入的线路功率指令P ref和Q ref，测量线路功率UL和测量线路功率P的外部线路功率控制来计算线和Q线; 根据通过外环功率控制输出的阀侧电流参考值，测量的阀侧电流和测量的阀侧，通过内阀侧电流控制来计算转换器输出电压基准值U cref 电压; 最后，一个转换器根据电压参考值输出一个相应的电压来控制线路功率，达到一个参考值。控制方法简单实用，可靠性高，可以快速，准确地控制线路功率，并可实现线路有功功率和无功功率的独立去耦控制。

33. 发明公开

EP3125394A1 UNIFIED POWER FLOW CONTROLLER FOR DOUBLE-CIRCUIT LINE 有权
标题翻译： UNIFORM潮流控制器的双回线
公开(公告)号：EP3125394A1
公开(公告)日：2017-02-01
申请号：EP15796511.2
申请日：2015-01-12
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： TIAN, Jie , LI, Haiying , WANG, Xinbao , DONG, Yunlong , SHEN, Quanrong , PAN, Lei , LIU, Chao , CHANG, Baoli
IPC分类号： H02J3/00
CPC分类号： H02J3/14 , H02J3/16 , H02J3/1814 , H02J3/46 , Y02E40/18
摘要： An unified power flow controller for a double-circuit transmission line comprises at least one parallel-connection transformer (1), three current converters (4), at least two series-connection transformers (8), a parallel-connection side switching circuit (3), a series-connection side switching circuit (6) and a direct current common bus (5). At least one side of the series-connection transformers is connected with at least one group of by-pass switches (9, 10) in parallel. The alternating current sides of the three current converters are connected to each loop line in series after being connected with at least one series-connection transformer through the series-connection side switching circuit (6). The alternating current sides of the three current converters are connected to an alternating current system after connected with at least one parallel-connection transformer (1) through a parallel-connection side switching circuit starting circuit (2). The direct current sides of the three current converters are connected to the direct current common bus (5) through a transfer switch. With the unified power flow controller, various operating modes can be realized, and when one current converter is in fault, power flow control of the double-circuit transmission line can still be achieved. The unified power flow controller is small in occupied space, low in cost, and excellent in economy, flexibility and reliability.

34. 发明授权

EP3125394B1 UNIFIED POWER FLOW CONTROLLER FOR DOUBLE-CIRCUIT LINE 有权
公开(公告)号：EP3125394B1
公开(公告)日：2019-08-07
申请号：EP15796511.2
申请日：2015-01-12
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： TIAN, Jie , LI, Haiying , WANG, Xinbao , DONG, Yunlong , SHEN, Quanrong , PAN, Lei , LIU, Chao , CHANG, Baoli
IPC分类号： H02J3/16 , H02J3/18

35. 发明公开

EP3082212A1 TRIPOLAR FLEXIBLE DIRECT-CURRENT POWER TRANSMISSION SYSTEM AND METHOD 有权
标题翻译：柔性胶片GLEICHSTROMÜBERTRAGUNGSSYSTEMUND VERFAHREN
公开(公告)号：EP3082212A1
公开(公告)日：2016-10-19
申请号：EP15796911.4
申请日：2015-01-22
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： HU, Ming , SHAO, Zhenxia , JIAO, Xinyan , TIAN, Jie , LU, Yu , SHEN, Gang
IPC分类号： H02J3/36
CPC分类号： H02J3/36 , H02J1/08 , H02M5/4585 , Y02E60/60
摘要： The present invention discloses a tripolar VSC-HVDC system and method, wherein a rectifier and an inverter consist of a three-phase six-bridge arms modular multilevel converter (MMC) respectively, and two converter valves are arranged on the DC side of the rectifier and inverter respectively, the midpoint of upper and lower converter valves of the rectifier and inverter are connected with a pole 3 DC line by a smoothing reactor, triggering of the upper and lower converter valves is controlled to change the DC voltage polarity of the pole 3 periodically, and tripolar DC transmission is realized by modulating current orders of the three poles. The technical solution provided by the invention can make full use of the three conductors for power transmission, has the characteristics of small occupied space of the converter station, low total conversion cost and high reliability, and it is particularly suitable for the implementation of conversion an AC line to a DC line for capacity increasing in large-sized urban power supply systems lacking in land resources.
摘要翻译：本发明公开了一种三极VSC-HVDC系统和方法，其中整流器和逆变器分别由三相六桥臂模块化多电平转换器（MMC）组成，并且两个转换阀布置在整流器的直流侧和逆变器，整流器和逆变器的上下转换阀的中点通过平滑电抗器与极点3直流线路连接，上下转换阀的触发被控制以改变极点3的直流电压极性周期性地和三极直流传输通过调节三极的电流顺序来实现。本发明提供的技术方案可充分利用三根导线进行输电，具有转炉站占用空间小，总转换成本低，可靠性高的特点，特别适用于转换交流线路到缺乏土地资源的大型城市供电系统的直流线路容量增加。

36. 发明授权

EP3082212B1 TRIPOLAR FLEXIBLE DIRECT-CURRENT POWER TRANSMISSION SYSTEM AND METHOD 有权
公开(公告)号：EP3082212B1
公开(公告)日：2019-05-15
申请号：EP15796911.4
申请日：2015-01-22
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： HU, Ming , SHAO, Zhenxia , JIAO, Xinyan , TIAN, Jie , LU, Yu , SHEN, Gang
IPC分类号： H02J3/36 , H02M5/458 , H02J1/08

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